Method for connecting bluetooth key to vehicle, vehicle bluetooth system, and bluetooth key

A vehicle Bluetooth system for performing the method for connecting a Bluetooth key to a vehicle, wherein, the vehicle Bluetooth system includes a Bluetooth master module and one or more Bluetooth slave modules connected with the Bluetooth master module through the CAN bus or LIN bus communication;

• The method comprises:
• Performing, by the Bluetooth master module of the vehicle, authentication and connection with the Bluetooth key of a mobile terminal according to preset key information when the mobile terminal enters a preset distance range of the vehicle;
• Waking up, by the Bluetooth master module, the Bluetooth slave module of the vehicle, and generating an original random code and encrypting the original random code to obtain an encrypted random code if the Bluetooth master module is successfully connected to the Bluetooth key;
• Sending, by the Bluetooth master module, the original random code to the Bluetooth slave module and sending the encrypted random code to the Bluetooth key;
• Obtaining, by the Bluetooth slave module, a first key signal according to the original random code, and broadcasting the first key signal;
• wherein the first key signal is configured to authenticate the Bluetooth slave module according to the first key signal and the encrypted random code when the Bluetooth key receives the first key signal;
• Receiving, by the Bluetooth slave module, the second key signal of the Bluetooth key, and authenticating the Bluetooth key according to the second key signal and the original random code;
• wherein the second key signal is the verification random code obtained by the Bluetooth key according to the encrypted random code;
• When bidirectional authentication by the Bluetooth slave module and the Bluetooth key succeeds, the Bluetooth slave module is successfully connected to the Bluetooth key.

A method for connecting a Bluetooth key to a vehicle, comprises:

• Performing, by the Bluetooth key of a mobile terminal, authentication and connection according to preset key information with a Bluetooth master module of the vehicle when a mobile terminal enters a preset distance range of a vehicle;
• Receiving, by the Bluetooth key, the encrypted random code sent by the Bluetooth master module if the Bluetooth key is successfully connected with the Bluetooth master module;
• Obtaining, by the Bluetooth key, a verification random code according to the encrypted random code, and obtains a second key signal according to the verification random code, and sends the second key signal to the Bluetooth slave module of the vehicle;
• Receiving, by the Bluetooth key, the first key signal sent by the Bluetooth slave module of the vehicle, and authenticating the Bluetooth slave module according to the first key signal and the verification random code;
• Wherein, the second key signal is configured to authenticate the Bluetooth key according to the second key signal and the original random code when the Bluetooth slave module receives the second key signal, the original random code is generated by the Bluetooth master module, and the encrypted random code is obtained by the Bluetooth master module according to the original random code;
• When bidirectional authentication by the Bluetooth slave module and the Bluetooth key succeeds, the Bluetooth slave module is successfully connected to the Bluetooth key.